>>31637271. Any you can get your hands on, but P&S cameras are generally dissapointing unless you shell out big money. Buy a SLR with a 50mm lens and you're golden
2. Cheap colour negative film. Fuji C200, Kodak Ultramax, whatever. Whatever film is cheapest where you live that's branded 'colour' in some way
3. Developing - search 'film lab near me' or something. Look at dev+scan prices and find the cheapest one. Later down the line you can start doing it yourself
4. Not really. Colour negative film generally prefers overexposure to underexposure, so if in doubt overexpose a bit.